“This bug was addressed in the Zoom client for macOS version 5.9.3 and we recommend you update to version 5.9.3 to apply the fix.”
Zoom kept the mic open after meetings ended, and users only found out because macOS shows an orange dot. Zoom calls it a bug. This is the company that once installed a hidden web server on Macs. Nobody would have known without the dot, which is exactly why every OS should have one.